OpenTable. Shares of the online restaurant reservation service jumped nearly 4% in pre-market trading off a favorable upgrade from Citigroup. The stock has since cooled, up 1.7% in midday trading. The firm upgraded OpenTable from neutral to buy, citing its strong growth, CNBC reports. Last quarter, OpenTable reported $52.3 million in revenue, a 22% bump compared to the same time last year.

Google. Today marks the start of the tech titan’s stock split. Common Class A shares will trade under the symbol GOOG, which are up 2% in midday trading. The new Class C shares will trade under the symbol GOOGL, trading around $570.

Apple. The Cupertino, Calif., company confirmed its Worldwide Developers Conference kicks off June 2 in San Francisco. The event usually involves a big keynote from CEO Tim Cook. Although WWDC normally does not serve as a platform for Apple to unveil big products like new iPhones or iPads, Apple might reveal the first details of the successor to mobile operating system iOS 7.

Amazon. The online retailer officially entered the TV hardware business with Fire TV, a $99 set-top box that will stream Amazon content as well as support apps from Netflix, Hulu and ESPN. The one thing not on “fire?” Amazon’s stock price following the Fire TV reveal. As of midday trading, it’s down 2.5%.

King. Shares of the game publisher are up nearly 2%, an early bright spot in an otherwise down first week for the maker of Candy Crush Saga. After launching its IPO at $22.50 last Wednesday, shares of King dipped near the $18 before covering a bit later in the week. On Wednesday, King shares closed down 2.5% at $19.25.